A power supply method, apparatus, device, and medium

Abstract

This invention provides a power supply method, apparatus, device, and medium. The method includes: acquiring vehicle status data of a new energy vehicle; determining the operating status of the new energy vehicle based on the vehicle status data; determining the power consumption information of the new energy vehicle when it is in operation; and determining a target DC-DC converter from at least three DC-DC converters of different power ratings based on the power consumption information, and using the target DC-DC converter to supply power to the new energy vehicle. This invention solves the problem of increasingly high low-voltage power consumption in vehicles, ensures stable operation and efficient energy management of vehicles under various operating conditions, guarantees power supply safety, and improves the functional safety level of vehicles.

Description

Technical Field

[0001] This invention relates to the field of power management, and in particular to a power supply method, apparatus, device, and medium. Background Technology

[0002] With the rapid development of new energy vehicles, power management technology faces numerous challenges, especially in battery management, vehicle electrical balance, power distribution, and functional safety. Managing the static current of new energy vehicle batteries and the overall vehicle electrical balance is complex and difficult, and battery depletion issues plague users. As the number of electrical appliances increases, the power output of a single DC-DC converter cannot meet the power requirements. Furthermore, the functional safety of new energy vehicles is paramount, and the safety of power supply to low-voltage components must be guaranteed. Summary of the Invention

[0003] In view of the above problems, the present invention aims to provide a power supply method, device, equipment and medium to solve the problem that the power consumption of low-voltage components is getting higher and higher, a single DC-DC converter cannot meet the power requirements, and the power supply safety of low-voltage components cannot be guaranteed.

[0004] According to a first aspect of the present invention, a power supply method is provided, applied to a new energy vehicle, the new energy vehicle including a power battery, the power battery including at least three high-voltage output ports, the high-voltage output ports being connected to at least three DC-DC converters of different power ratings; characterized in that the method includes:

[0005] Obtain the vehicle status data of the new energy vehicle;

[0006] The operating status of the new energy vehicle is determined based on the vehicle status data; the operating status includes a dormant state and an operating state.

[0007] When the new energy vehicle is in operation, determine the power consumption information of the new energy vehicle;

[0008] Based on the power consumption information of the new energy vehicle, a target DC-DC converter is determined from the at least three DC-DC converters with different power ratings, and the target DC-DC converter is used to power the new energy vehicle.

[0009] Optionally, determining the operating status of the new energy vehicle based on the vehicle status data includes:

[0010] The ignition switch status, engine speed, and speed of the new energy vehicle, as well as the current and voltage of the load in the new energy vehicle, are obtained.

[0011] The operating status of the new energy vehicle is determined based on the ignition switch status, the generator speed, the speed of the new energy vehicle, and the current and voltage of the load.

[0012] Optionally, determining the power consumption information of the new energy vehicle when it is in operation includes:

[0013] Obtain the current of the load in the new energy vehicle, and obtain the power consumption value of the new energy vehicle based on the current of the load;

[0014] If the power consumption value is less than or equal to a preset power consumption threshold, then the new energy vehicle is determined to be in a low power consumption state.

[0015] If the power consumption value is greater than the preset power consumption threshold, then the new energy vehicle is determined to be in a high power consumption state.

[0016] Optionally, the new energy vehicle includes constant power components, redundant components, non-redundant components, and high-power components; the DC-DC converter includes a first DC-DC converter, a second DC-DC converter, and a third DC-DC converter, wherein the power of the second DC-DC converter is greater than the power of the first DC-DC converter, which is greater than the power of the third DC-DC converter.

[0017] Based on the power consumption information of the new energy vehicle, a target DC-DC converter is determined from at least three DC-DC converters of different power ratings, and the target DC-DC converter is used to power the new energy vehicle, including:

[0018] If the new energy vehicle is in a low-power state, a first DC-DC converter is used to power the constant power components, and a second DC-DC converter is used to power the redundant components, the non-redundant components, and the high-power components.

[0019] If the new energy vehicle is in a high power consumption state, a third DC-DC converter is used to supply power to the redundant components and the high-power components.

[0020] Optionally, the new energy vehicle further includes a central control unit, which in turn includes a time counter;

[0021] If the new energy vehicle is in a high-power state, a third DC-DC converter is used to power the redundant components and the high-power components, including:

[0022] Obtain the output voltage and output current of the second DC-DC converter;

[0023] Calculate the output power of the second DC-DC converter based on the output voltage and the output current;

[0024] If the output power is greater than the first preset output power threshold, the time counter is activated;

[0025] If the time counter reaches the preset time, the third DC-DC converter is turned on to supply power to the redundant components and the high-power components;

[0026] After the third DC-DC converter is turned on, if the output power of the second DC-DC converter is less than the second preset output power threshold and this continues for a preset time, then the third DC-DC converter is turned off.

[0027] Optionally, the second DC-DC converter uses a dual circuit to power the redundant components;

[0028] If the new energy vehicle is in a high-power state, the method of using a third DC-DC converter to power the redundant components and the high-power components further includes:

[0029] Obtain the current and voltage data of the dual circuits;

[0030] For either of the dual circuits, if the current data or voltage data is greater than a preset current threshold or a preset voltage threshold, the circuit is determined to be damaged.

[0031] In the event of circuit failure, the third DC-DC converter is used to power the redundant components.

[0032] Optionally, the power battery includes a high-voltage relay;

[0033] The method further includes:

[0034] When the new energy vehicle is in a dormant state, the second DC-DC converter and the third DC-DC converter are shut down by the high-voltage relay, and the first DC-DC converter is used to supply power to the constant-power components.

[0035] According to a second aspect of the present invention, a power supply device is also provided, characterized in that the device comprises:

[0036] The data acquisition module is used to acquire the vehicle status data of the new energy vehicle;

[0037] The status determination module is used to determine the operating status of the new energy vehicle based on the vehicle status data; the operating status includes a dormant state and an operating state.

[0038] A power consumption determination module is used to determine the power consumption information of the new energy vehicle when the new energy vehicle is in operation.

[0039] The power supply module is used to determine a target DC-DC converter from at least three DC-DC converters of different power levels based on the power consumption information of the new energy vehicle, and to use the target DC-DC converter to supply power to the new energy vehicle.

[0040] According to a third aspect of the present invention, an electronic device is also provided, characterized in that it includes a processor, a memory, and a computer program stored in the memory and capable of running on the processor, wherein the computer program, when executed by the processor, implements the power supply method as described above.

[0041] According to a fourth aspect of the present invention, a computer-readable storage medium is also provided, characterized in that a computer program is stored on the computer-readable storage medium, and the computer program, when executed by a processor, implements the power supply method as described above.

[0042] The power supply method provided in this invention acquires vehicle status data of a new energy vehicle; determines the operating status of the new energy vehicle based on the vehicle status data, including a dormant state and an operating state; when the new energy vehicle is in the operating state, determines the power consumption information of the new energy vehicle; and, based on the power consumption information, determines a target DC-DC converter from at least three DC-DC converters of different power ratings, and uses the target DC-DC converter to power the new energy vehicle. This invention eliminates the need for a storage battery and uses a power battery to power the vehicle, which helps reduce R&D complexity and improve R&D efficiency. Furthermore, by managing and controlling DC-DC converters of different power ratings according to different operating conditions and needs, it solves the problem of increasingly high low-voltage power consumption in vehicles. Through refined power management, it ensures stable operation and efficient energy consumption management of the vehicle under various operating conditions, guarantees the power supply safety of the vehicle, and improves the functional safety level of the vehicle.

[0043] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0044] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0045] Figure 1 This is a flowchart illustrating the steps of a power supply method according to an embodiment of the present invention;

[0046] Figure 2 This is a power supply circuit design diagram provided in one embodiment of the present invention;

[0047] Figure 3 This is a schematic diagram of a power supply device provided in an embodiment of the present invention. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details are presented in the various embodiments of the present invention to facilitate a better understanding of the invention. However, the technical solutions claimed in the present invention can be implemented even without these technical details and with various changes and modifications based on the following embodiments. The division of the various embodiments below is for ease of description and should not constitute any limitation on the specific implementation of the present invention. The various embodiments can be combined with and referenced by each other without contradiction.

[0049] A DC-DC converter is an electronic circuit or power module used to convert direct current (DC) voltage from one voltage level to another. Its main functions include: voltage conversion, transforming the input DC voltage into the desired output DC voltage; voltage regulation, maintaining a stable output voltage unaffected by input voltage fluctuations or load changes; and efficiency improvement, reducing energy loss through efficient energy conversion. Through efficient voltage conversion and regulation, it ensures the stable operation of various electronic systems under different voltage requirements.

[0050] Reference Figure 1 The diagram illustrates a step flowchart of a power supply method according to an embodiment of the present invention, which may specifically include the following steps:

[0051] Step 101: Obtain the vehicle status data of the new energy vehicle.

[0052] In this application, all electricity consumption of the new energy vehicle is provided by a power battery, eliminating the need for a storage battery. Using a power battery instead of a storage battery can reduce the number of components in the vehicle's power system, simplify the design and manufacturing process, and also mean reducing the frequency of maintenance and replacement, lowering long-term maintenance costs. Furthermore, it can improve energy utilization efficiency, enhance system reliability, and improve vehicle performance.

[0053] The power battery includes at least three high-voltage output ports, each of which is connected to a DC-DC converter, and each DC-DC converter has a different power output.

[0054] Vehicle status data can be acquired through various sensors. For example, a vehicle speed sensor monitors vehicle speed to determine if the vehicle is in motion; an accelerator pedal sensor monitors the position of the accelerator pedal to determine if the driver is accelerating; a brake pedal sensor monitors the position of the brake pedal to determine if the driver is braking; current and voltage sensors monitor the current and voltage of various loads in the vehicle to determine if they are within the normal operating voltage range; and switch status sensors monitor the status of the ignition switch or start button. Additionally, information such as engine speed can be obtained from the engine control unit (ECU) to determine if the engine is running.

[0055] The engine control unit is responsible for controlling the engine's operation and provides engine status information through communication with the CCU (Central Control Unit). The CCU is the core of the vehicle's power management system and is responsible for coordinating and controlling the operation of various power modules.

[0056] Step 102: Determine the operating status of the new energy vehicle based on the vehicle status data; the operating status includes a dormant state and an operating state.

[0057] The CCU can receive data from various sensors to determine whether the vehicle is in a working or dormant state.

[0058] It should be noted that vehicles typically use a CAN bus (Controller Area Network) for data transmission and communication between various control modules. The CCU receives data from the ECU, BCM, and other sensors via the CAN bus and makes a comprehensive judgment.

[0059] For example, a switch status sensor detects the status of the ignition switch or start button and outputs a corresponding signal. The CCU or BCM receives and processes the signal from the ignition switch or start button. Based on the received signal, the CCU or BCM determines the status of the ignition switch or start button (such as "ON", "START", "OFF" etc.).

[0060] The system monitors the ignition switch status to determine whether it is in the "ON" or "START" state, obtains information such as engine speed through the ECU to determine whether the engine has started, monitors vehicle speed sensor data to determine whether the vehicle is in motion, and monitors the current and voltage of various loads to determine whether the vehicle is in the overall operating state. Based on the above data, the system determines the operating status of the vehicle.

[0061] If the ignition switch is in the "ON" or "START" position and the engine is started, the vehicle is considered to be in a working state. If the vehicle speed sensor detects that the vehicle speed is greater than zero, the vehicle is considered to be in a working state. The vehicle is considered to be in a working state by monitoring the current and voltage of various loads (such as electric motors, electronic devices, etc.). Based on the above data, the vehicle is considered to be in a working state.

[0062] Step 103: When the new energy vehicle is in operation, determine the power consumption information of the new energy vehicle.

[0063] When determining whether a vehicle is in operation, it is necessary to further determine whether the vehicle is in a low-energy-consumption state or a high-energy-consumption state, and adopt different DC-DC power supply strategies according to the level of vehicle energy consumption.

[0064] The total power consumption of a vehicle can be obtained by monitoring the voltage and current of each load (such as motors, electronic devices, etc.) in the vehicle.

[0065] Current and voltage sensors are installed in the power supply circuits of each load to monitor the current and voltage of the load in real time. The analog signals output by the current and voltage sensors are transmitted to an analog-to-digital converter (ADC) through a signal acquisition circuit. The ADC converts the analog signals into digital signals for processing by the control system. The control system collects the voltage and current data of each load in real time, calculates the power of each load, and adds up the power of all loads to obtain the total power consumption of the vehicle. Specifically, the power P can be calculated by multiplying the voltage (V) and the current (I): P = V * I.

[0066] The ADC is integrated into a microcontroller unit (MCU) or a digital signal processor (DSP). The MCU and DSP are important components of the CCU. The MCU acquires and processes sensor data in real time and calculates the power of each load. The DSP handles complex power management algorithms, such as power calculation and load balancing. Both can perform power calculation of loads in the vehicle.

[0067] By comparing the vehicle's total power consumption with a preset power consumption threshold, it can be determined whether the vehicle is in a high power consumption state or a low power consumption state.

[0068] In addition, if the vehicle speed sensor detects that the vehicle speed is close to zero or very low, it is determined that the vehicle is in a low power consumption state. If the accelerator pedal, brake pedal and steering sensors detect that the driver has not made any obvious operation, it is determined that the vehicle is in a low power consumption state.

[0069] By monitoring load current, vehicle speed, driver operation, and other information, and performing logical judgments, the vehicle's power consumption information can be accurately determined. This comprehensive judgment method ensures that the power management system can dynamically adjust the operating mode and power allocation of each DC-DC converter according to the actual operating status of the vehicle.

[0070] Step 104: Based on the power consumption information of the new energy vehicle, determine the target DC-DC converter among the at least three DC-DC converters with different power ratings, and use the target DC-DC converter to power the new energy vehicle.

[0071] After obtaining the vehicle's power consumption information (high power consumption state or low power consumption state), DC-DC converters of different power ratings can be used to power the vehicle according to different operating conditions.

[0072] By using the above methods to manage and control DC-DC converters of different power levels according to different operating conditions and needs, the problem of increasingly high low-voltage power consumption in vehicles is solved. Through refined power management, stable operation and efficient energy consumption management of vehicles under various operating conditions are ensured, the power supply safety of vehicles is guaranteed, and the functional safety level of vehicles is improved.

[0073] In this embodiment of the invention, vehicle status data of the new energy vehicle is acquired; the operating status of the new energy vehicle is determined based on the vehicle status data, including a dormant state and an operating state; when the new energy vehicle is in the operating state, its power consumption information is determined; based on the power consumption information of the new energy vehicle, a target DC-DC converter is determined from at least three DC-DC converters of different power levels, and the target DC-DC converter is used to power the new energy vehicle. This embodiment of the invention eliminates the storage battery and uses a power battery to power the vehicle, which helps to reduce R&D complexity and improve R&D efficiency; in addition, by managing and controlling DC-DC converters of different power levels according to different operating conditions and needs, the problem of increasingly high low-voltage power consumption in vehicles is solved. Through refined power management, stable operation and efficient energy consumption management of the vehicle under various operating conditions are ensured, the power supply safety of the vehicle is guaranteed, and the functional safety level of the vehicle is improved.

[0074] In an optional embodiment of the present invention, step 102 further includes the following steps:

[0075] S1021, acquire the ignition switch status, engine speed, speed of the new energy vehicle, and the current and voltage of the load in the new energy vehicle.

[0076] The status of the ignition switch or start button is obtained through the switch status sensor; the vehicle speed is obtained through the vehicle speed sensor; the current and voltage of various loads in the vehicle are obtained through the current and voltage sensors; the engine control unit is responsible for controlling the operation of the engine and providing engine status information, such as engine speed.

[0077] S1022, determine the operating status of the new energy vehicle based on the ignition switch status, the generator speed, the speed of the new energy vehicle, and the current and voltage of the load.

[0078] The CCU determines the vehicle's operating status by receiving data from various sensors.

[0079] For example, monitoring the ignition switch status to determine whether it is in the "ON" or "START" state; obtaining information such as engine speed through the ECU to determine if the engine is started; monitoring vehicle speed sensor data greater than 0 to determine if the vehicle is in motion; monitoring the current and voltage of various loads to determine if they are within the normal operating voltage range; combining the above judgments, it can be determined that the vehicle is in working condition.

[0080] If the ignition switch is in the "OFF" position and the engine is not started, the vehicle is determined to be in a dormant state. If the vehicle speed sensor detects that the vehicle speed is zero or close to zero, the vehicle is determined to be in a dormant state. By monitoring the current and voltage of various loads (such as motors, electronic devices, etc.), it is determined that they are not within the normal operating voltage range. Based on the above judgments, it can be determined that the vehicle is in a dormant state.

[0081] By comprehensively assessing the vehicle's operating status, the power management system ensures that it can dynamically adjust the operating mode and power distribution of each DC-DC converter according to the vehicle's actual operating status.

[0082] In an optional embodiment of the present invention, step 103 further includes the following sub-steps:

[0083] S1031, Obtain the current of the load in the new energy vehicle, and obtain the power consumption value of the new energy vehicle based on the current of the load;

[0084] S1032, if the power consumption value is less than or equal to a preset power consumption threshold, then the new energy vehicle is determined to be in a low power consumption state.

[0085] S1033, if the power consumption value is greater than the preset power consumption threshold, then the new energy vehicle is determined to be in a high power consumption state.

[0086] Current and voltage sensors are installed in the power supply circuits of each load to monitor the current and voltage of the load in real time.

[0087] The analog signals output by the current and voltage sensors are transmitted to the ADC (Analog-to-Digital Converter) via a signal acquisition circuit. The ADC converts the analog signals into digital signals for processing by the control system. The control system collects voltage and current data from each load in real time and calculates the power of each load. Specifically, the power P can be calculated by multiplying the voltage (V) and current (I): P = V * I. By summing the power of all loads, the vehicle's power consumption can be obtained.

[0088] A power consumption threshold is pre-set, which is typically determined based on the following factors: vehicle design requirements; vehicle type (different types of vehicles, such as passenger cars, commercial vehicles, electric vehicles, and hybrid vehicles, have different power consumption requirements); load characteristics (different loads on the vehicle, such as motors, electronic devices, and sensors, have different power consumption characteristics, requiring the power consumption threshold to be determined based on actual load requirements); actual testing and verification; load testing (measuring the vehicle's power consumption under different operating conditions through actual load testing to determine the boundaries between high and low power consumption); data analysis (analyzing the test data to determine the power consumption threshold, ensuring accurate judgment of whether the vehicle is high or low power consumption in practical applications, etc., this application does not impose any restrictions.

[0089] The vehicle's power consumption value is compared with a preset power consumption threshold. If the vehicle's power consumption value is greater than the preset power consumption threshold, the vehicle is determined to be in a high-energy-consumption state; otherwise, it is in a low-energy-consumption state.

[0090] In an optional embodiment of the present invention, step 104 further includes the following sub-steps:

[0091] S1041, if the new energy vehicle is in a low power consumption state, a first DC-DC converter is used to power the constant power component, and a second DC-DC converter is used to power the redundant component, the non-redundant component, and the high power component.

[0092] S1042, if the new energy vehicle is in a high power consumption state, a third DC-DC converter is used to supply power to the redundant components and the high-power components.

[0093] The common types of components in vehicles include:

[0094] Components requiring continuous power are those that need a constant power supply even when the vehicle is in a dormant or off state. Examples include the body control module, which manages the vehicle's electronic systems such as lights, windows, and door locks; anti-theft systems, including vehicle alarms and remote key receivers, which require a continuous power supply to maintain their anti-theft function; clocks and calendars; and telematics units, etc.

[0095] Redundant components: The system design employs a redundancy strategy, which means that there are multiple identical components or power supply lines to ensure that if a component or line fails, the system can switch to a backup component or line and continue to work normally. Problems with redundant components can affect vehicle safety.

[0096] Non-redundant components are components without redundant design in the system and do not affect vehicle safety.

[0097] High-power components are those that require high power to operate and typically involve applications with high current or high voltage. Examples include electric motors, electric seat adjusters, and lidar systems.

[0098] The power battery includes at least three high-voltage output ports, taking three high-voltage output ports as an example: High-voltage output 1, High-voltage output 2, and High-voltage output 3. High-voltage output 1 is always on to maintain power supply to the constantly powered components, High-voltage output 2 is on when the vehicle is in operation, and High-voltage output 3 is on when power consumption is too high. Specifically, the CCU determines whether the total power consumption of the vehicle exceeds a preset power consumption threshold by collecting sensor data (voltage and current data), and then determines whether to activate High-voltage output 3; the CCU determines the vehicle's operating status, and if it is in operation, it activates High-voltage output 2.

[0099] The first DC-DC converter (DCDC1) is connected to high-voltage output 1, the second DC-DC converter (DCDC2) is connected to high-voltage output 2, and the third DC-DC converter (DCDC3) is connected to high-voltage output 3. The power ratings of the three DC-DC converters are: DCCDC2 > DCCDC3 > DCCDC1.

[0100] When the vehicle is in a low-power state, DC-DC1 and DC-DC2 operate. DC-DC1 supplies power to the constantly powered components, while DC-DC2 supplies power to redundant, non-redundant, and high-power components. Furthermore, some of the constantly powered components also contain redundant parts, and DC-DC2 also supplies power to these redundant components. When DC-DC2 supplies power to redundant components, a dual-circuit power supply is required to ensure the normal power supply to these redundant components.

[0101] When the vehicle is in a high power consumption state, DC-DC2 cannot meet the power requirements, and DC-DC3 needs to work to power redundant components and high-power components.

[0102] Through a sophisticated power management strategy, the power needs of the vehicle under different operating conditions are met, while the reliability and safety of the system are improved through redundancy design.

[0103] In an optional embodiment of the present invention, S1042 further includes the following sub-steps:

[0104] S1042-1, Obtain the output voltage and output current of the second DC-DC converter;

[0105] S1042-2, Calculate the output power of the second DC-DC converter based on the output voltage and the output current.

[0106] Voltage and current sensors are used to monitor the output voltage and current of DC-DC2 in real time. The analog signals output by the voltage and current sensors are transmitted to the ADC. The ADC converts the analog signals output by the sensors into digital signals and transmits the converted digital signals to the central control unit (CCU) for processing. The core processing unit (MCU) or DSP in the CCU receives the digital signals from the ADC, calculates the output power of DC-DC2, and decides whether to turn on DC-DC3.

[0107] S1042-3, If the output power is greater than the first preset output power threshold, the time counter is turned on.

[0108] The first preset output power threshold is set to 90% of the maximum power consumption of the DC-DC2. The maximum power consumption of the DC-DC2 is known.

[0109] If the output power of the DC-DC converter exceeds 90% of its maximum power consumption, a timer is activated to start timing. This timer is typically integrated into the CCU or MCU and is used to record the duration for which the DC-DC converter's output power exceeds a threshold.

[0110] Specifically, when the vehicle power management system is started, the time counter is initialized to zero. The CCU or MCU monitors the output power of the DC-DC2 in real time and determines whether it exceeds the first preset output power threshold. When the output power exceeds the threshold, the time counter starts counting.

[0111] S1042-4, If the time counter reaches a preset time, the third DC-DC converter is turned on to supply power to the redundant components and the high-power components.

[0112] In this embodiment of the invention, the preset time is set to 30 seconds.

[0113] If the timer reaches 30 seconds, it triggers the DC-DC3 to turn on. The power management module receives the instruction from the CCU and controls the DC-DC3 to turn on, providing power to redundant and high-power components.

[0114] S1042-5, after the third DC-DC converter is turned on, if the output power of the second DC-DC converter is less than the second preset output power threshold and continues for a preset time, then the third DC-DC converter is turned off.

[0115] The second preset output power threshold is set to 80% of the maximum power consumption of the DC-DC2.

[0116] After DCDC3 is turned on, if the output power of DCDC2 is detected to drop below 80% of the maximum power consumption of DCDC2 and remains so for 30 seconds, then DCDC3 will be turned off.

[0117] The above methods enable real-time monitoring and control of power distribution, ensuring that corresponding operations are triggered under specific conditions, thereby improving vehicle reliability and safety.

[0118] In an optional embodiment of the present invention, S1042 further includes the following sub-steps:

[0119] S4-1, Obtain the current and voltage data of the dual circuits;

[0120] S4-2, for any of the dual circuits, if the current data or voltage data is greater than a preset current threshold or a preset voltage threshold, the circuit is determined to be damaged.

[0121] S4-3, In the event of circuit failure, the third DC-DC converter is used to power the redundant components.

[0122] The DCDC2 uses a dual circuit to power the redundant components, and the redundant components can be powered not only by the DCDC2 but also by the DCDC3, ensuring redundant power supply for the redundant components.

[0123] Voltage and current sensors are used to monitor the voltage and current of the dual power supply to the redundant DC-DC2 component in real time, collecting voltage and current data for both power supplies. The analog signals output by the sensors are transmitted to the ADC, which converts the analog signals into digital signals and transmits the converted digital signals to the CCU. The CCU compares the voltage and current data of the dual power supplies to determine if any anomalies exist. Specifically, voltage and current thresholds are set. When the voltage or current of one power supply exceeds the normal range, it is determined that the circuit may be damaged. When the circuit is damaged, a DC-DC3 activation command is triggered. The power management module receives the command from the CCU and controls the DC-DC3 to activate, ensuring redundant power supply to the redundant component.

[0124] In an optional embodiment of the present invention, the following steps may also be included:

[0125] S1, when the new energy vehicle is in a dormant state, the second DC-DC converter and the third DC-DC converter are turned off by the high-voltage relay, and the first DC-DC converter is used to supply power to the constant power components.

[0126] High-voltage relays, located inside the power battery, are a key component in the power management system of electric and hybrid vehicles. They are primarily used to control the high-voltage output of the power battery, ensuring its safe and efficient operation under various conditions. Essentially, a high-voltage relay is a switch; by controlling its on / off state, it controls the high-voltage power supply. High-voltage relays are typically driven by an electromagnetic coil. When the coil is energized, it generates a magnetic field that attracts the contacts to close, connecting the high-voltage power supply. When the coil is de-energized, the magnetic field disappears, the contacts open, and the high-voltage power supply is disconnected. The system monitors the status of the high-voltage relay in real time to ensure its correct operation.

[0127] When the CCU determines that the vehicle is in a dormant state based on sensor data, the CCU sends a command to control the high-voltage relays inside the power battery to shut down DC-DC2 and DC-DC3. The CCU will monitor the status of the high-voltage relays in real time to ensure that they are shut down correctly.

[0128] The DC-DC1 must always be on to power the constantly powered components. The DC-DC1 operates in a low-power mode to reduce energy consumption.

[0129] When the vehicle is in sleep mode, the power management system controls high-voltage relays to shut down DC-DC2 and DC-DC3, ensuring that the constantly powered components are continuously powered by DC-DC1. This design strategy improves vehicle energy efficiency and battery life by reducing unnecessary energy consumption. Through real-time monitoring and control, the system can ensure a stable power supply to the constantly powered components in sleep mode while optimizing energy management.

[0130] Through the above-described embodiments of the invention, DC-DC converters of different power ratings are managed and controlled according to different operating conditions and needs, solving the problem of increasingly high low-voltage power consumption in vehicles. Through refined power management, stable operation and efficient energy consumption management of vehicles under various operating conditions are ensured, guaranteeing the power supply safety of vehicles and improving the functional safety level of vehicles.

[0131] Reference Figure 2 The diagram shows a power supply circuit design according to an embodiment of the present invention, as detailed below:

[0132] The power battery 4 has three high-voltage output ports, each managed and controlled according to different operating conditions and needs. High-voltage output 1 is always on, providing a stable power supply to constantly powered components. It is designed in a low-power mode to reduce energy consumption. High-voltage output 2 is activated when the vehicle is powered on, i.e., when the vehicle is in operation. When power is detected (e.g., the ignition switch is turned on), high-voltage output 2 is activated and continuously supplies power during power-on to ensure the normal operation of various vehicle systems. When the vehicle enters sleep mode or is turned off, high-voltage output 2 is deactivated. High-voltage output 3 is activated only when power consumption is too high. When the total power consumption of the vehicle exceeds a preset high power consumption threshold, high-voltage output 3 is activated; when the power consumption drops below the threshold, high-voltage output 3 is deactivated.

[0133] DC-DC converter 1 is connected to high-voltage output 1 to power the constantly powered component 5. DC-DC converter 2 is connected to high-voltage output 2 to power the high-power component 8, redundant component 6, non-redundant power supply device 7, and redundant components in the constantly powered component 5. DC-DC converter 3 is connected to high-voltage output 3 to power the high-power component 8 and redundant component 6.

[0134] Both redundant components 6 and constant power components 5 provide dual power supply, ensuring that if one power supply line fails, the other power supply line can continue to supply power, thus guaranteeing the continuous operation of the components.

[0135] Reference Figure 3 The diagram shows a structural schematic of a power supply device according to an embodiment of the present invention, the device comprising:

[0136] The data acquisition module 201 is used to acquire the vehicle status data of the new energy vehicle;

[0137] The status determination module 202 is used to determine the operating status of the new energy vehicle based on the vehicle status data; the operating status includes a dormant state and an operating state.

[0138] The power consumption determination module 203 is used to determine the power consumption information of the new energy vehicle when the new energy vehicle is in operation.

[0139] The power supply module 204 is used to determine a target DC-DC converter from at least three DC-DC converters of different power levels based on the power consumption information of the new energy vehicle, and to use the target DC-DC converter to supply power to the new energy vehicle.

[0140] In an optional embodiment of the present invention, the state determination module 202 includes:

[0141] The first acquisition module is used to acquire the ignition switch status, engine speed, speed of the new energy vehicle, and the current and voltage of the load in the new energy vehicle.

[0142] The operating status determination module is used to determine the operating status of the new energy vehicle based on the ignition switch status, the generator speed, the speed of the new energy vehicle, and the current and voltage of the load.

[0143] In an optional embodiment of the present invention, the power consumption determination module 203 includes:

[0144] The power consumption calculation module is used to obtain the current of the load in the new energy vehicle and obtain the power consumption value of the new energy vehicle based on the current of the load.

[0145] The first judgment module is used to determine that the new energy vehicle is in a low power consumption state if the power consumption value is less than or equal to a preset power consumption threshold.

[0146] The second judgment module is used to determine that the new energy vehicle is in a high power consumption state if the power consumption value is greater than a preset power consumption threshold.

[0147] In an optional embodiment of the present invention, the new energy vehicle includes a constant-power component, a redundant component, a non-redundant component, and a high-power component; the DC-DC converter includes a first DC-DC converter, a second DC-DC converter, and a third DC-DC converter, wherein the power of the second DC-DC converter is greater than the power of the first DC-DC converter, which is greater than the power of the third DC-DC converter; the power supply module 204 includes:

[0148] The first power supply module is used to supply power to the constant power components using a first DC-DC converter and to supply power to the redundant components, the non-redundant components, and the high-power components using a second DC-DC converter if the new energy vehicle is in a low power consumption state.

[0149] The second power supply module is used to supply power to the redundant components and the high-power components by employing a third DC-DC converter if the new energy vehicle is in a high-power state.

[0150] In an optional embodiment of the present invention, the new energy vehicle further includes a central control unit, which in turn includes a time counter; the second power supply module includes:

[0151] The second acquisition module is used to acquire the output voltage and output current of the second DC-DC converter;

[0152] An output power calculation module is used to calculate the output power of the second DC-DC converter based on the output voltage and the output current.

[0153] The third judgment module is used to activate the time counter if the output power is greater than the first preset output power threshold.

[0154] The activation module is used to activate the third DC-DC converter to supply power to the redundant components and the high-power components if the time counter reaches a preset time.

[0155] The shutdown module is used to shut down the third DC-DC converter if, after the third DC-DC converter is turned on, the output power of the second DC-DC converter is less than a second preset output power threshold and this continues for a preset time.

[0156] In an optional embodiment of the present invention, the second DC-DC converter uses a dual-circuit power supply for the redundant components; the second power supply module further includes:

[0157] The third acquisition module is used to acquire the current data and voltage data of the dual circuits;

[0158] The fourth judgment module is used to determine that the circuit is damaged if the current data or voltage data is greater than a preset current threshold or a preset voltage threshold for either of the dual circuits.

[0159] The third power supply module is used to supply power to the redundant components using the third DC-DC converter in the event of circuit failure.

[0160] In an optional embodiment of the present invention, the power battery includes a high-voltage relay; the device further includes:

[0161] The fourth power supply module is used to shut down the second and third DC-DC converters via the high-voltage relay when the new energy vehicle is in a dormant state, and to use the first DC-DC converter to supply power to the constantly powered components.

[0162] In this embodiment of the invention, vehicle status data of the new energy vehicle is acquired; the operating status of the new energy vehicle is determined based on the vehicle status data, including a dormant state and an operating state; when the new energy vehicle is in the operating state, its power consumption information is determined; based on the power consumption information of the new energy vehicle, a target DC-DC converter is determined from at least three DC-DC converters of different power levels, and the target DC-DC converter is used to power the new energy vehicle. This embodiment of the invention eliminates the storage battery and uses a power battery to power the vehicle, which helps to reduce R&D complexity and improve R&D efficiency; in addition, by managing and controlling DC-DC converters of different power levels according to different operating conditions and needs, the problem of increasingly high low-voltage power consumption in vehicles is solved. Through refined power management, stable operation and efficient energy consumption management of the vehicle under various operating conditions are ensured, the power supply safety of the vehicle is guaranteed, and the functional safety level of the vehicle is improved.

[0163] An embodiment of the present invention also provides an electronic device, including a processor, a memory, and a computer program stored in the memory and capable of running on the processor, wherein the computer program, when executed by the processor, implements the power supply method as described above.

[0164] The memory may include random access memory (RAM) or non-volatile memory, such as at least one disk storage device. Optionally, the memory may also be at least one storage device located remotely from the aforementioned processor.

[0165] The processor can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0166] An embodiment of the present invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the power supply method described above.

[0167] As the apparatus embodiment is basically similar to the method embodiment, it is described in a relatively simple manner. For relevant details, please refer to the description of the method embodiment.

[0168] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present invention are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid state disk (SSD)).

[0169] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0170] The various embodiments in this specification are described in a related manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0171] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A power supply method applied to a new energy vehicle, the new energy vehicle including a power battery, the power battery including at least three high-voltage output ports, the high-voltage output ports being connected to at least three DC-DC converters of different power ratings; characterized in that, The method includes: Obtain the vehicle status data of the new energy vehicle; The operating status of the new energy vehicle is determined based on the vehicle status data; the operating status includes a dormant state and an operating state. When the new energy vehicle is in operation, determine the power consumption information of the new energy vehicle; Based on the power consumption information of the new energy vehicle, a target DC-DC converter is determined from the at least three DC-DC converters with different power ratings, and the target DC-DC converter is used to power the new energy vehicle.

2. The method according to claim 1, characterized in that, Determining the operating status of the new energy vehicle based on the vehicle status data includes: The ignition switch status, engine speed, and speed of the new energy vehicle, as well as the current and voltage of the load in the new energy vehicle, are obtained. The operating status of the new energy vehicle is determined based on the ignition switch status, the generator speed, the speed of the new energy vehicle, and the current and voltage of the load.

3. The method according to claim 1, characterized in that, Determining the power consumption information of the new energy vehicle when it is in operation includes: Obtain the current of the load in the new energy vehicle, and obtain the power consumption value of the new energy vehicle based on the current of the load; If the power consumption value is less than or equal to a preset power consumption threshold, then the new energy vehicle is determined to be in a low power consumption state. If the power consumption value is greater than the preset power consumption threshold, then the new energy vehicle is determined to be in a high power consumption state.

4. The method according to claim 1 or 3, characterized in that, The new energy vehicle includes constant power components, redundant components, non-redundant components, and high-power components; the DC-DC converter includes a first DC-DC converter, a second DC-DC converter, and a third DC-DC converter, wherein the power of the second DC-DC converter is greater than the power of the first DC-DC converter, which is greater than the power of the third DC-DC converter. Based on the power consumption information of the new energy vehicle, a target DC-DC converter is determined from at least three DC-DC converters of different power ratings, and the target DC-DC converter is used to power the new energy vehicle, including: If the new energy vehicle is in a low-power state, a first DC-DC converter is used to power the constant power components, and a second DC-DC converter is used to power the redundant components, the non-redundant components, and the high-power components. If the new energy vehicle is in a high power consumption state, a third DC-DC converter is used to supply power to the redundant components and the high-power components.

5. The method according to claim 4, characterized in that, The new energy vehicle also includes a central control unit, which in turn includes a time counter; If the new energy vehicle is in a high-power state, a third DC-DC converter is used to power the redundant components and the high-power components, including: Obtain the output voltage and output current of the second DC-DC converter; Calculate the output power of the second DC-DC converter based on the output voltage and the output current; If the output power is greater than the first preset output power threshold, the time counter is activated; If the time counter reaches the preset time, the third DC-DC converter is turned on to supply power to the redundant components and the high-power components; After the third DC-DC converter is turned on, if the output power of the second DC-DC converter is less than the second preset output power threshold and this continues for a preset time, then the third DC-DC converter is turned off.

6. The method according to claim 4, characterized in that, The second DC-DC converter uses a dual circuit to power the redundant components; If the new energy vehicle is in a high-power state, the method of using a third DC-DC converter to power the redundant components and the high-power components further includes: Obtain the current and voltage data of the dual circuits; For either of the dual circuits, if the current data or voltage data is greater than a preset current threshold or a preset voltage threshold, the circuit is determined to be damaged. In the event of circuit failure, the third DC-DC converter is used to power the redundant components.

7. The method according to claim 1, characterized in that, The power battery includes a high-voltage relay; The method further includes: When the new energy vehicle is in a dormant state, the second DC-DC converter and the third DC-DC converter are shut down by the high-voltage relay, and the first DC-DC converter is used to supply power to the constant-power components.

8. A power supply device, characterized in that, The device includes: The data acquisition module is used to acquire the vehicle status data of the new energy vehicle; The status determination module is used to determine the operating status of the new energy vehicle based on the vehicle status data; the operating status includes a dormant state and an operating state. A power consumption determination module is used to determine the power consumption information of the new energy vehicle when the new energy vehicle is in operation. The power supply module is used to determine a target DC-DC converter from at least three DC-DC converters of different power levels based on the power consumption information of the new energy vehicle, and to use the target DC-DC converter to supply power to the new energy vehicle.

9. An electronic device, characterized in that, It includes a processor, a memory, and a computer program stored in the memory and capable of running on the processor, wherein the computer program, when executed by the processor, implements the power supply method as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, A computer program is stored on the computer-readable storage medium, which, when executed by a processor, implements the power supply method as described in any one of claims 1 to 7.

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